When is an atom stable? a. when it has a full outer orbit. b. when it has the same amount of elections as protons. c. when it has no neutrons. d. when it has an odd number of valance electrons

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

What are two different ways you could find the value of a? explain these methods.

What quantity do units represent in value